The second symbol learned is "Sei Hei Kei" aka "Mental/Emotional Symbol" or "Harmony". It means "Mind Be Still". This symbol is used for purification, cleansing and protection. It directs energy to the emotional body or subconscious mind.
Hosanna Reiki Symbol is a very powerful symbol in Karuna Reiki. Many times you see this symbol on the walls of houses in villages.This symbol has two opposite triangles together with curved top is similes to Apta reiki symbol.